John FitzGerald, a longtime City Hall employee running to fill the open District 3 Council seat, has picked up support from the Massachusetts Nurses Association and the Greater Boston Labor Council.

FitzGerald is one of seven candidates running for District 3. The Dorchester-based seat opened up after Frank Baker, who was first elected in 2011, said he would not be running for another two-year term.

“John understands our members' crucial role on the front lines of providing quality health care to countless patients across Boston every day,” said Katie Murphy, head of the nurses union and a practicing ICU nurse. “Whether it be fighting to secure safe staffing levels, ensuring our members receive the wages and benefits they deserve or any number of other important issues, we know that we can count on John to have our back.”

FitzGerald, who is a son of the late Mission Hill state Rep. Kevin Fitzgerald, noted his mother worked as a nurse. “If elected, I would be proud to stand alongside and fight for them and their members every day on the Boston City Council,” FitzGerald said of the nurses union.

The union counts 23,000 members across 85 health care facilities.

The Greater Boston Labor Council, a union umbrella group with 100,000 members, has also endorsed FitzGerald, who has consistently drawn union support since announcing his bid for City Council several months ago.

The other District 3 candidates include community activist Jennifer Johnson of Meetinghouse Hill; former teacher Barry Lawton of Savin Hill/Uphams Corner; Savin Hill labor attorney Matt Patton; Boston Public Schools teacher Joel Richards of Fields Corner; former nonprofit leader Ann M. Walsh of Lower Mills; and housing activist Rosalind Wornum of Ashmont.